Abstract The optical behaviour, stoichiometry, surface configuration of Cu 2 Se nanostructured thin layers prepared at different reaction times by the chemical process has been considered. band gap deposited films decreases from 2.92 eV to 2.08 for first transition and 2.18 1.2 second transition. In addition, it was shown that Urbach energy is independent film thickness, tail values localized s...

We studied the optical properties of as-prepared (amorphous) and thermally crystallized (fcc) flash evaporated Ge2Sb2Te5 thin films using variable angle spectroscopic ellipsometry in the photon energy range 0.54 4.13 eV. We employed Tauc-Lorentz model (TL) and CodyLorentz model (CL) for amorphous phase and Tauc-Lorentz model with one additional Gaussian oscillator for fcc phase data analysis. T...

We develop techniques to study the temperature dependent localization, thermalization, and effects of phonon scattering on excitons in halide perovskites from analysis emission spectra. The excitonic Urbach edge, when inferred low energy tails luminescence spectra, is shown be sensitive electron distribution thermalization. A method observe focus devised for where dependence gap anomalous. valu...

detail_view&confID=40&abstractID=34492; cited May 8, 2008] 25. Hodgson D, Urbach D, Przybysz R, Gong Y, Sullivan T, Rabeneck L. Cancer surgery. Chapter 2. In: Tu JV, Pinfold SP, McColgan P, Laupacis A, eds. Access to Health Services in Ontario. Toronto: Institute for Clinical Evaluative Sciences; April 2005: 10. [Available online at: www.ices.on.ca/WebBuild/ site/ices-internet-upload/file_colle...

In this issue of Genes & Development, Urbach and colleagues (pp. 971-982) provide compelling data suggesting a role for LIN28 in the pathogenesis of a significant percentage of Wilms tumors. These data extend our insights in the genetics underlying Wilms tumor development and emphasize the importance of stemness and microRNA-mediated processes in the origins of these tumors.

Silica based glasses are used as nuclear shielding materials. The effect of radiation on these glasses varies as per the constituents used in these glasses. Glasses of different composition of SiO2-Na2OMgO-Al2O3 were made by melt casting techniques. These glasses were irradiated with neutrons of different fluences. Optical absorption measurements of neutron-irradiated silica based glasses were ...